William h



WILLIAM H.

ST. JOHN, OF NEW YORK, N. Y.

COPPER-RING GAS-RETORT FASTENING.

Specication of Letters Patent No. 16,075, dated November 11, 1855.

To all 'whom 25 may concern Be it known that I, WVM. I-I. ST. JOHN, of the city of New York, in the State of New York, have invented a new and Improved Mouthpiece and Flue for Retorts for the Manufacture of Gas; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in providing the ordinary retort for making gas with a new mouthpiece so constructed as to form gas tight joints between the lid and mouthpiece, without resorting to the old method of luting the lid with clay or some other material of the kind to prevent the escape of gas during the process of manufacture, and also the application of eXtra fines and a hot air chamber under the floor of t-he mouthpiece for the purpose of consuming the tar and oil which accumulate in the mouthpiece under the central gas pipe H, as shown on the plan Figure l.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I construct a section of av cylinder flat at the bottom, corresponding with the usual form of retort, but may be of any other shape to suit the form of the retort, with a flange A where it is fastened to the retort, and another iiange I projecting a sufficient height above the body of the mouth piece to receive the bed N when closed. The flange I has a groove or gutter V shaped eut or turned out midway between the sides, being part of a circle to receive a corresponding projection on the lid N which is hung on hinges E, on Fig. 2. The groove in the flange I is to have a covering or ring of copper so as to form a more perfect joint than the two surfaces of the same kind of metal can make. Besides the copper ring can' be removed at pleasure and new ones inserted without changing the mouth piece. To facilitate the closingv and opening the lid, and by that means saving the gas which otherwise would be lost by the delay occasioned by the old method, I have attached an arched lever or clamp, marked D. The clamp is also attached to a hinge between hinges E E with an eye bolt O, see Figs. l and 4, and an adjusting nut J to make the projection on the lid N always fit exactly in the groove in iange I. The eye bolt O pierces an ear or projection Q of the mouthpiece. The clamp D is in the form of a cross fastened by a movable clamp F and an adjusting nut and screw I). By this arrangement the lid N of the mouth piece is always brought into closed contact with the fiange I and groove by tightening the nut P on the end of the movable screw F at pleasure. Screw F is bolted to a projecting ear R of the mouth piece.

S S are t projections on the air chamber by which it is bolted to the mouth piece.

The tube is intended for the conveyance of hot air from the furnace under the bottom of the retort to the air chamber M beneath the mouth piece for the purpose of consuming and converting into a gas the tar and oil which accumulate in the bottom of the mouthpiece, and thereby preventing this substance (oil and tar) from clogging up the joints in the flanges of the lid N and mouthpiece.

K, K are escape chambers for hot air from chamber M. See Fig. 2.

The letter T represents slides to clean air chamber M and flues K.

The flue L receives the heat direct from the furnace, enters the air chamber M and then passes through the tubes K K into the brick work again.

The round spots near the letter U, on Fig. 3 represent bolts which attach the mouth piece to the retort.

I am aware that lead has been used for tightening the joints of boilers. This however I do not claim; but

What I claim as new and desire to secure by Letters Patent is- I 1. The tightening with copper of the joints of doors of gas retort heads when the said joint is effected by the otherwise usual groove inserted in the flange of the mouth piece to meet a corresponding projection on the door in the manner and for the purposes specified.

- 2. I further claim as my invention and wish to secure b y Letters Patent the placing a hot air chamber beneath the mouth piece to consume the tar and oil collecting on the bottom of the latter.

WM. H. ST. JOHN.

Witnesses:

Jos. I-IAssoN, HARRIS SCovELL. 

